EaEqn.H

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{
    volScalarField& hea = thermo.he();
 
    fvScalarMatrix EaEqn
    (
        betav*fvm::ddt(rho, hea) + mvConvection->fvmDiv(phi, hea)
      + betav*fvc::ddt(rho, K) + fvc::div(phi, K)
      + (
            hea.name() == "ea"
          ? fvc::div(fvc::absolute(phi, rho, U), p/rho)
          : -betav*dpdt
        )
      - fvm::laplacian(Db, hea)
      + betav*fvModels.source(rho, hea)
    );
 
    EaEqn.relax();
 
    fvConstraints.constrain(EaEqn);
 
    EaEqn.solve();
 
    fvConstraints.constrain(hea);
 
    thermo.correct();
}